JPH0739602B2 - Converter tap hole repair device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support mechanism for connecting and centering a repair device for expanding and crimping a cylindrical repair material inserted into a tap hole of a converter to a converter furnace body. It is a thing.

[0002]

2. Description of the Related Art Several methods have been proposed in the past for repairing refractory-lined steel outlet holes in a converter. For example, "a method and device for repairing a converter tap hole" (Japanese Patent Application Laid-Open No. Sho-6
No. 1-110711) discloses a method in which a repair material is spread radially outward by a roller diameter expanding device and pressure-bonded to the inner surface of a tapped hole. However, this method has a drawback that the shape of the lining material after pressure bonding cannot be maintained due to the buckling phenomenon of the annular core material after the diameter expansion because the annular core material is used. The greater the thickness, the more noticeable.

Further, when a thermoplastic hardening material is used as the material for the repair material, the work can be carried out by the heat retained on the repaired object side, but the inside of the repaired material, that is, the roller diameter expansion side, does not receive heat and the molded product collapses. To do. Alternatively, the repair material is decomposed into the outside and the inside, and the durability of the refractory repair material is extremely reduced.

Further, a two-layer structure of a thermoplastic curable material and a room temperature curable material may be considered, but it becomes a weak point when the boundary portion is separated.

In addition to the above-mentioned construction method, the press-fitting method (Japanese Patent Publication No. 61-
No. 8124), spraying method (Japanese Patent Laid-Open No. 60-24311), and the like, but the denseness after repairing is not preferable, and wear resistance and melt damage resistance are low.
Inferior service life.

[0006] The applicant of the present invention has proposed Japanese Patent Application No. 1-199125 "Cylindrical refractory material repairing method" as a construction method that surpasses the conventional construction method. The outline is, when repairing a cylindrical refractory material, insert a pre-designed cylinder of thermoplastic hardening material into the inside of the cylindrical refractory material to be repaired that has sufficient heat to soften the thermoplastic hardening material, and further apply pressure. This is a method of expanding and repairing the cylindrical body by moving the expanding jig.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a converter tap hole repairing device used when the above-mentioned cylindrical refractory material repairing method is applied to the converter tap hole repair.

In the operation of a converter, a severe wave of hot metal or slag in the furnace is generated by oxygen blowing from the lance. Therefore, the converter body is constantly vibrating during operation. In addition, the converter is tiltable so as to smooth the work such as pig iron, tapping, and slag, and mechanical backlash will be present at the tilt stop position after long-term use.

When repairing a tap hole during the operation of such a converter, a repair device is fixed to a fixed portion of a building or the like so that the tap hole having vibration or mechanical backlash cannot be relatively moved. When combined, there is a problem that repair of the tapped hole will not be straightened and the repair device will be broken.

An object of the present invention is to provide a repairing device having a support mechanism for connecting and centering which can surely repair a tapped hole during a converter operation.

[0011]

According to the present invention, a gantry is arranged in front of a tap hole of a converter, and a forward / backward sliding pedestal is provided on the gantry.
A cylindrical repair material is inserted and placed in the tapped hole on the forward / backward slide table, and a moving / expanding repair device for expanding / lining the diameter is installed so that it can be lifted up and down. An engagement member is provided in the front part of the diameter expansion repair device, and when the engagement member of the moving / diameter expansion repair device is aligned with the center line of the tapped hole, a pin member that engages with the engagement member is provided. The rear end of the pedestal is pivotally supported at a point on the axial line extension of the steel exit hole of the converter in an upright state, and the tip of the gantry is mounted on the pedestal elevation adjustment drive device. It is a converter steel tap hole repair device characterized by being suspended and supported by the above-mentioned moving and expanding repair device, and the front end and rear end of the mount are suspended by independent mount-elevation adjustment drive devices. The above-mentioned converter tap hole repairing device, which is characterized in that the front and rear rocking fulcrums of the moving / diameter expanding repairing device mounted on the mount are It is the rolling furnace tapping hole repair apparatus, characterized in that Re or in providing the swing regulating device.

[0012]

According to the present invention, the tip of the moving / expanding repair device is engaged with and coincides with the tapping hole of the converter in operation, and the moving / expanding repair device can be elevated to the pedestal. The rear end of the pedestal was set up and the rear end of the pedestal was rotatably supported at one point on the axial extension of the tap hole of the converter in the upright state, and the front end was suspended and supported by the pedestal elevation adjustment drive device. Therefore, the centering for arranging and adjusting the moving / diameter expanding repair device on the extension line of the tap hole can be easily performed.

Further, since the front end portion and the rear end portion of the gantry are suspended by independent gantry / elevation adjustment drive devices, the moving / diameter expanding repair device is arranged and adjusted on the extension line of the tapped hole in the same manner as above. Can be implemented easily.

Further, since the swing adjusting device is provided either in front of or behind the swing fulcrum of the moving / diameter expanding repair device, the moving / diameter expanding repair device is arranged and adjusted on the extension line of the tapped hole. Centering can be operated automatically and remotely.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an illustration of an embodiment of the present invention.
A pedestal 2 is arranged in front of the converter tap hole 1. A forward-backward sliding base 3 is provided on the base 2. The forward / backward slide base 3 moves forward / backward on the base 2 by the operation of a drive device 4 such as a cylinder. On the slide table 3, a cylindrical repair material used for repairing the steel tap hole of the operating converter is inserted and arranged in the tap hole, and the diameter is expanded and lined.・ Expansion repair device 5
It is installed so that it can be lifted up with a shaft support 6.

The moving / expanding repair device 5 includes a guide cylinder 7 for accommodating a plurality of cylindrical repair materials (not shown), a cylinder 8 arranged at the rear end of the guide cylinder 7, and the cylinder 8. Rod (not shown) connected to the rod (not shown) and extended into the guide cylinder 7 (not shown),
The above-mentioned cylindrical repair material is inserted into this pull-out rod and is housed in the guide cylinder 7. The tip of this pull-out rod has a plug (not shown) for expanding and lining the cylindrical repair material. No) is fixed. An engaging member 9 is provided in the front part of the moving / diameter expanding repair device 5 configured as described above. On the other hand, the pin member 10 is fixed to the furnace body in the vicinity of the tap hole 1 so as to be orthogonal to the center line of the tap hole 1. Therefore, when the engaging member 6 of the moving / diameter expanding repair device 5 is engaged with the pin member 10, the tip of the moving / diameter expanding repair device 5 is maintained in a state of being aligned with the center line of the tapped hole 1.

The rear end of the gantry 2 on which the moving / expanding repair device 5 is mounted is a point on the axial line extension of the tapping hole 1 of the converter in an upright state, and the shaft support 12 is attached to a structure 11 such as a building. To do. Also,
The tip of the gantry 2 is suspended and supported by a gantry / elevation adjustment drive device 13.

Therefore, when the pedestal elevation adjustment drive device 13 is operated, the pedestal 2 can be elevated up and down with the shaft 12 as a fulcrum, so that the pedestal elevation adjustment drive is performed so that the engaging member 9 is positioned on the axis of the tapped hole 1. When the device 13 is operated to raise the gantry 2 and then the forward / backward sliding base 3 is moved forward, the engaging member 9 engages with the pin member 10. In this engaged state, the gantry / elevation adjustment drive device 13 is actuated to move the gantry 2 up and down by a small amount, so that the movement / diameter expansion repair device 5 with the shaft 6 as a fulcrum serves as the center line of the tapped hole 1. It can be adjusted to a state that conforms to.

FIG. 2 is an explanatory view showing another embodiment of the present invention, in which the pedestal / elevation adjustment drive device 13 is provided, in which the front end portion and the rear end portion of the pedestal 2 on which the moving / diameter expanding / repairing device 5 is mounted are respectively independent. It is a support structure suspended by. Therefore, by operating the independent gantry / elevation adjustment drive device 13 with the engaging member 9 engaged with the pin member 10 to move the gantry 2 up and down by a slight amount, position adjustment is performed as compared with the case of FIG. In a state where the degree of freedom is high, the movement / diameter expansion repair device 5 can be adjusted to match the center line of the tapped hole 1 with the shaft 6 as a fulcrum.

As described above, the forward-backward sliding base 3 on the base 2
Since the shaft 6 is arranged so as to be swingable at one point, the moving / expanding repair device 5 is engaged with the pin member 10 of the tapping hole 1, and the center of the tapping hole 1 and the moving / expanding repair device 5 are engaged. After matching the centers, adjust with the gantry / elevation adjustment drive device 13
If the moving / expanding repair device 5 is placed on the extension of the center line, the moving / expanding repair device 5 will swing and follow the shaft 6 as a fulcrum, so that the converter operation is in progress. The repair of the tapped hole 1 can be done in a straight line.

In order to make the setting of the elevation angle of the gantry 2 equipped with the moving / diameter expanding repair device 5 simpler and finely adjustable including the mechanical backlash of the converter or repair device, As shown in FIG. 3, the fine adjustment of the repair device 5 is performed at either the front or the rear of the shaft 6 which pivotally supports the movable / expansion repair device 5 at one point. A device 14 is provided. In this case, the front side is installed. The fine adjustment elevation device 14 engages with a shaft 15 provided on both left and right sides of the repair device 5 with a member 16 which can be vertically engaged with each other, and is connected to a drive device 17 for finely adjusting the vertical movement of the member 16. Configured.

Therefore, according to the mechanism configured as described above, the pedestal elevation adjustment drive device 13 adjusts the elevation angle to a preset elevation angle and installs it, and the fine adjustment elevation device 14 adjusts the displacement such as mechanical backlash. A setting method of centering by driving can be adopted.

[0023]

According to the present invention, since the moving / expanding repair device for repairing the tapped hole, the connecting tapping of the tapped hole, and the centering can be reliably performed for the converter in operation, it is perfect. Can be repaired. In addition, since the repair can be quickly performed during the converter operation, it is possible to significantly improve the production efficiency as compared with the method in which the repair is performed during the non-operation.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing another embodiment of the present invention.

FIG. 3 is an explanatory diagram showing another embodiment of the present invention.

[Explanation of symbols]

1: Steel tapping hole of converter 2: Stand 3: Forward / backward sliding stand 4: Drive device 5: Moving / expanding repair device 6: Support shaft 7: Guide cylinder 8: Drive device 9: Engagement member 10: Pin member 11: Structure 12: Support shaft 13: Frame elevation / elevation drive device 14: Fine adjustment elevation device 15: Shaft 16: Vertical playable member 17: Drive device

Claims (3)

[Claims] 1. A gantry is arranged in front of a converter tap hole, a forward / backward slide is provided on the gantry, and a cylindrical repair material is inserted into the tap hole on the forward / backward slide. The moving / expanding repair device for expanding / lining the shaft is installed so that it can be lifted up / down, and an engaging member is provided in the front part of the moving / expanding repair device. When the engaging member of the moving / diameter expanding repair device is aligned on the line, a pin member engaging with the engaging member is fixed to the furnace body in the vicinity of the tapping hole, and the tapping steel of the converter in the upright state is fixed. A converter steel tap hole repairing device, characterized in that the rear end of the pedestal is pivotally supported at a point on the extension of the axis of the hole, and the tip end of the pedestal is suspended and supported by a pedestal / elevation adjustment drive device. 2. The converter taphole repair according to claim 1, wherein the gantry equipped with the moving / diameter expanding repair device is hung from the front and rear ends by independent gantry / elevation adjustment drive devices. apparatus. 3. A converter output steel according to claim 1 or 2, wherein a swing adjusting device is provided at either the front or the rear of the swing fulcrum of the moving / diameter expanding repair device mounted on the pedestal. Hole repair device.